Dear Ti
请问SN74LVC1G08-Q1 是否支持 down translation(也就是IC1.8V供电时,输入为3.3V )
谢谢!
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Dear Ti
请问SN74LVC1G08-Q1 是否支持 down translation(也就是IC1.8V供电时,输入为3.3V )
谢谢!
是的,
当输入信号大于VCC电压时,主要考虑的是低电平,因为低电平更不容易满足规格。1.8V供电时,低电平电压要小于0.35VCC,即0.63V,而3.3V的信号低电平输出规格一般最大可能是0.3VCC,即0.3*3.3=0.99V,这就不能被SN74LVC1G08-Q1正确识别为低电平了。